High quality materials: The phone holder is made of high quality zinc alloy and stainless steel. Zinc alloy has good ductility and abrasion resistance, avoid breakage when dropped. it is sturdy and can hold the ring tightly which helps it become a good long-term support. High strength adhesive: With strong and adhesive 3M VHB tape, you can securely attach the ring holder to your mobile phone or tablet, to make sure your phone is safe. Multi-function: This ring holder is designed to prevent your phone from accidentally falling and sliding. You can use it to watch videos, listen to music by putting it on your desk, in the car, kitchen counter, next to your bed, etc. 360 rotation and 180 adjustable : You can adjust or turn it easily, and it will stay firm after you fix it. Easy to adjust, allowing vertical and horizontal viewing when reading, watching videos. Universal Compatibility: This phone holder perfectly fits all smartphones, like iPhone 11 Pro Max / XS / 8 Plus/7 Plus/6s Plus/6 Plus, Samsung Galaxy S10 Plus/S9/S8/S Note: Please allow minor errors due to manual measurement. Thanks for your understanding. Monitors are not calibrated same, item color displayed in photos may be showing slightly different from the real object. Please take the real one as standard. Delivery quantity: 4 rooms